netwerk/base/src/nsSimpleStreamListener.cpp

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  15  * The Original Code is mozilla.org code.
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  19  * Portions created by the Initial Developer are Copyright (C) 2001
  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  *   Darin Fisher <darin@netscape.com> (original author)
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  25  * Alternatively, the contents of this file may be used under the terms of
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  38
  39 #include "nsSimpleStreamListener.h"
  40
  41 //
  42 //----------------------------------------------------------------------------
  43 // nsISupports implementation...
  44 //----------------------------------------------------------------------------
  45 //
  46 NS_IMPL_ISUPPORTS3(nsSimpleStreamListener,
  47                    nsISimpleStreamListener,
  48                    nsIStreamListener,
  49                    nsIRequestObserver)
  50
  51 //
  52 //----------------------------------------------------------------------------
  53 // nsIRequestObserver implementation...
  54 //----------------------------------------------------------------------------
  55 //
  56 NS_IMETHODIMP
  57 nsSimpleStreamListener::OnStartRequest(nsIRequest *aRequest,
  58                                        nsISupports *aContext)
  59 {
  60     return mObserver ?
  61         mObserver->OnStartRequest(aRequest, aContext) : NS_OK;
  62 }
  63
  64 NS_IMETHODIMP
  65 nsSimpleStreamListener::OnStopRequest(nsIRequest* request,
  66                                       nsISupports *aContext,
  67                                       nsresult aStatus)
  68 {
  69     return mObserver ?
  70         mObserver->OnStopRequest(request, aContext, aStatus) : NS_OK;
  71 }
  72
  73 //
  74 //----------------------------------------------------------------------------
  75 // nsIStreamListener implementation...
  76 //----------------------------------------------------------------------------
  77 //
  78 NS_IMETHODIMP
  79 nsSimpleStreamListener::OnDataAvailable(nsIRequest* request,
  80                                         nsISupports *aContext,
  81                                         nsIInputStream *aSource,
  82                                         PRUint32 aOffset,
  83                                         PRUint32 aCount)
  84 {
  85     PRUint32 writeCount;
  86     nsresult rv = mSink->WriteFrom(aSource, aCount, &writeCount);
  87     //
  88     // Equate zero bytes read and NS_SUCCEEDED to stopping the read.
  89     //
  90     if (NS_SUCCEEDED(rv) && (writeCount == 0))
  91         return NS_BASE_STREAM_CLOSED;
  92     return rv;
  93 }
  94
  95 //
  96 //----------------------------------------------------------------------------
  97 // nsISimpleStreamListener implementation...
  98 //----------------------------------------------------------------------------
  99 //
 100 NS_IMETHODIMP
 101 nsSimpleStreamListener::Init(nsIOutputStream *aSink,
 102                              nsIRequestObserver *aObserver)
 103 {
 104     NS_PRECONDITION(aSink, "null output stream");
 105
 106     mSink = aSink;
 107     mObserver = aObserver;
 108
 109     return NS_OK;
 110 }